CAJ | 학술논문

通过调节微波反应溶液的pH值合成了一系列Mo修饰的Pt/C催化剂并用于乙醇的电氧化催化反应。利用X射线衍射(XRD)、透射电子显微镜(TEM)及X射线光电子能谱(XPS)对催化剂的晶型结构、微观形貌、粒径尺寸和表面电子结构进行了表征，并采用循环伏安法(CV)、计时电流法(CA)和电化学阻抗谱(EIS)对催化剂的乙醇电氧化催化性能进行了测试。结果表明，碱性环境有利于催化剂组分在碳载体上的均匀分布， pH值为14时制得的催化剂组分颗粒尺寸最小，且分布最均匀。该催化剂不仅表现出了最大的有效电化学比表面积和最高的乙醇电氧化催化活性，而且具有最稳定的乙醇氧化催化性能。
통과조절미파반응용액적pH치합성료일계렬Mo수식적Pt/C최화제병용우을순적전양화최화반응。이용X사선연사(XRD)、투사전자현미경(TEM)급X사선광전자능보(XPS)대최화제적정형결구、미관형모、립경척촌화표면전자결구진행료표정，병채용순배복안법(CV)、계시전류법(CA)화전화학조항보(EIS)대최화제적을순전양화최화성능진행료측시。결과표명，감성배경유리우최화제조분재탄재체상적균균분포， pH치위14시제득적최화제조분과립척촌최소，차분포최균균。해최화제불부표현출료최대적유효전화학비표면적화최고적을순전양화최화활성，이차구유최은정적을순양화최화성능。
A series of Mo-modified Pt/C catalysts were synthesized, using a microwave-assisted technique, and the effects of pH value on the electrocatalytic performance of the resulted catalysts for ethanol oxidation were investigated. X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were employed to characterize the crystal structures, morphologies, particle sizes and the distributions, and electronic states of the catalysts. Cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) were used to investigate the catalytic performances. The results revealed that alkaline environments are beneficial in the syntheses of catalysts with smal and uniformly dispersed particles on the carbon support. The catalyst prepared at pH 14 exhibited the smal est catalyst particles, highest electrochemical surface area, best electrocatalytic activity, and durability for ethanol oxidation.